Decorative extrusion



FIG. 1 is a front elevational view of the decorative extrusion showing my new design;

FIG. 2 is a back elevational view thereof;

FIG. 3 is a right side elevational view thereof; and,

FIG. 4 is a bottom plan view thereof.

The left side elevational view is substantially similar to the right side elevational view illustrated and the top plan view is substantially similar to the bottom plan view illustrated. 

The ornamental design for a decorative extrusion, as shown and described. 